Rotary engine



No; 620,636. Patented Mar. 7, I899. T. BERG.

RBTARY ENGINE.

lie

n filed Apr. 14, 1898. (No 3 She6tsSheet I.

L L r" HM unummumnmrmn No. 620,636. Patented Mar. 7, I899. T. BERG.

ROTARY ENGINE.

(Application filed Apr. 14, 1898.) (No Model.) 5 I 3 SheetsShee i 2.

No. 620,636. Patented Mar. 7, I899. T. BERG.

ROTARY- ENGINE.

(Applicatiop filed. Apr. 14, 1898.) (No Model.) 3 Sheets'-Sheet 3.

IIIIINIIIIIHH Ewen 207 NIT-ED STATES PATENT OFFICE.

THEODORE BERG, OF CHICAGO, ILLINOIS, ASSIGNOR TO GUSTAF JOHNSON, EDWARD NELSON, CHARLES F. PETERSON, OLAF F. OLSON, AND NELS H.

OLSON, OF SAME PLACE.

7 Application filed April 14, 1898.

To all whom it may concern.-

Be it known that I, THEODORE BERG, a citi zen of the United States, residing at Chicago, in the county of Cook and State of Illinois,

have invented certain new and useful Improvements in Rotary Engines, of which the following is a specification.

This invention relates to improvements in that class of steam-engines known as rotary 1o engines; and it consists in certain peculiarities of the construction, novel arrangement, and operation of the various parts thereof, as will be hereinafter more fully set forth and specifically claimed.

The objects of my invention are, first, to provide a rotary engine in which the greatest amount of power shall be derived from a minimum expenditure of steam and directly applied in a rotary motion; second, a rotary engine in which the admission of steam to the cylinder will be automatically regulated, so as to supply steam to the cylinder and against the piston in the required quantities at proper times; third, to construct a rotary engine which may be caused to rotate in either direction, and, fourth, to provide a steam-cylinder and piston to operate therein which shall be of such construction as to be positive and efiective in operation.

Other objects and advantages will appear in the description hereinafter set forth.

In order to enable others skilled in the art to which my invention pertains to make and use the same, I will now proceed to describe it, referring to the accompanying drawings, in which- Figure 1 is a view in side elevation of my engine as it appears when ready for operation. Fig. 2 is a cross-sectional view, partly in elevation, through the cylinder, taken on line 2 2 of Fig. 1, looking in the direction indicated by the arrow. Fig. 8 is a plan view of the piston detached, illustrating a portion thereof broken away to show the construction of the same. Fig. 4 is a sectional View of a portion of one of the cylinder-heads and parts of the supply and exhaust pipes, illustrating the construction of one of the valves. Fig. 5 is a sectional view of a portion of the steam-cylinder and sections of the main shaft,

ROTARY ENGINE.

SPECIFICATION forming part of Letters Patent No. 620,636, dated March '7, 1899.

Serial No- 677536. (No model.)

showing the manner of securing the hub, which carries the piston, thereto. Fig. 6 is a view in elevation of a portion of one of the sections of the main shaft. Fig. 7 is a face view thereof. Fig. 8 is a face View of the governor-disk,and Fig. 9 is a plan or edge View thereof.

Similar letters refer to like parts throughout the different views of the drawings.

A represents the frame or support for the engine, on the upper portion of which are j ournaled in suitable bearings the sections A, comprising the main or driving shaft. Mounted on the bed a of the support orframe is the steam-cylinder B, which is provided at its ends with cylinder-heads b and 12, having near their upper portions stuffing-boxes b for the sections A of the main shaft. The interior surface of the cylinder B is cam-shaped in cross-section, as is clearly shown in Fig. 1 of the drawings, for the reception and operation of the wing-piston B, as will be presently explained. That end of each of the sections A of the main shaft extending into the cylinder B is provided with an annular flange a, which 7 5 fit in suitable mortises or recesses c in the ends of the hub C, which is so located as to fit snugly within the upper curved portion 12 of the cylinder. Each of the flanges a on the sections A of the main shaft is provided with a diametrical slot a for the reception and operation of the piston B, which passes through a diametrical opening 0 in the hub or interior cylinder. The piston B is composed of four sections (I, having alternately at their meeting edges grooves cl and tongues 01 to engage each other. Located within the grooves are springs (P, which have a tendency to press the sections 01 of the piston apart, yet will yield sufficiently to allow it to conform to the curves 0 of the cam of the steam-cylinder.

One of the cylinder-heads, and usually that one indicated by the reference-letter b, is provided with ports 6 and c, to be used as supply or exhaust ports alternatively, according to 5 the direction in which the engine is rotated. On the outer surface of the cylinder-head having the ports therein and at each port is located a valve-casing E, which has communicating therewith the steam-supply pipes F I00 and exhaust-pipes g, the former being connected to a boiler. (Not shown.) WVithin each of the valve-casings E is rotatably secured a valve-stem e, which is provided with a cut-out part c to register with the ports 6 and 6 when it is desired to admit steam to the cylinder. On the ends of the valve-stems e are fixed at one of their ends arms h, to the other ends of which are pivotally secured rods h, which are also similarly secured to levers H, suitably fulcrumed and connected at their lower ends to the cylinder-heads or a part near by by means of springs H, which will normally hold the lower ends of said levers in the position shown in Fig. 1 of the drawings. Each of the levers H is provided with a hand piece If at its free end to be used in forcing it toward the cylinder, where it may be held by means of a hook h pivotally secured on the cylinder-head, when it is desired that the valve which said lever controls shall be opened into the exhaust-pipe. Each of the levers H is provided with a laterally-extending arm h, which will impinge the movable governors g, which are carried by the disk M, mounted on one of the sections of the main shaft. This disk is provided on its surface adjacent to the cylinder with a guideway m, which extends diametrically across the disk and in which the governors g are movably located and usually dovetailed, as shown in Fig. 9. Each of the governors g is provided with a lug g having an opening therethrough and which passes through slots m in the disk. Passing through the openings in the lug g are rods 'n, which are secured at one of their ends to the hub of the disk and have at their outer ends nuts or heads 91, which serve to hold the springs 92 located between said heads and lugs, in position on the rods. As shown in Fig. 1 of the drawings, the governors g" taper from their outer ends inwardly and are slightly rounded on their surfaces adjacent to the cylinder, Located in the supply-pipes F are valves f, of the ordinary or any preferred construction, which are operated by means of a lever f, rod f and arm f pivotally secured together, so that when one valve is open the other one is closed.

The operation of my engine is simple and as follows: Steam is admitted to the cylinder through one of the ports 6 or e, the valve in the other port being turned through the medium of the lever H and its connections with the valve, so as to open the exhaust-port, the lever H being held in the proper position by means of one of the hooks h on the cylinder. The lever H controls the valve at the port being used as a supply-port, being held in the position shown in Fig. 1 of the drawings by reason of the spring H, in which position the arms h will impinge the governors g in the revolution of the disk M, which carries them, which operation will cause the valve to open the supply-port twice in each revolution of the piston,which,bein g m ovably fitted within the hub or inner cylinder 0 and ends of the sections A of the main shaft,will be extended at one of its ends and retracted at its other by reason of its contact with the cam-shaped or inner surface of the cylinder. The piston being made in sections and provided with springs between the meeting edges of said sections, it is apparent that it will be continually held in close yet yielding contact with the inner surface of the cylinder. As the speed of the engine increases it is evident that the governors will be moved toward the periphery of the disk M by reason of centrifugal force, the springs n being used to press them centrally and to regulate their movements. It is also apparent that as the governors g taper toward their inner ends the arm 71. on the lever H, passing over the reduced portions of the governors, will be moved in a lesser degree thereby than when it passes over the enlarged portion of said governors, and will thereby admit smaller quantities of steam to the cylinder, or, in other words, will regulate the quantity of steam admitted to the cylinder as the speed of the engine requires. By turning one of the levers H to. ward the cylinder and there securing it the valve e will be turned so that the port in the cylinder will communicate with the exhaustpipe, and it is obvious that either of the ports may be used as a supply or exhaust, dependin g on the direction in which it is desired that the shaft of the engine shall rotate.

Having thus fully described my invention, 7

what I claim as new, and desire to secure by Letters Patent, is=

1. The combination with a steam-cylinder having ports for the supply and exhaust of steam, of a rotary'shaft located in said cylinder, a disk mounted on the shaft and carrying movable governors, a valve at the sup ply-port, a lever fulcrumed between the said valve and the disk and having an arm to impinge the governors and a connection with the valve, substantially as described.

2. The combination with a steam-cylinder having ports for the supply and exhaust of steam, of a rotary shaft located in said cylinder, a win g-piston movably passing through said shaft within the cylinder, a valve at the supply-port, a disk mounted on the shaft and carrying movable and spring-actuated governors, a spring-held lever f ulcrumed between the valve and the disk and having an arm to impinge the governors and a connection with the valve, substantially as described.

3. The combination with a steam-cylinder having ports for the supply and exhaust of steam, of a rotary shaft located in said cylinder, a wing-piston comprising a series of spring-actuated sections, the said piston movably passing diametrically through said shaft, a valve at the supply-port, a disk mounted on the shaft and carrying movable and springactuated governors, a spring-controlled lever fulcrumed between the disk and valve and having an arm to impinge the governors and a connection with the valve, substantially as governors and a connection with the valve described. to open and close the same by the revolution I0 4. The combination with a rotary shaft, of of the disk, substantially as described.

a disk mounted thereon and having a diametrical guideway, governors movably secured THEODORE BERG in said guideway, a valve located near the l/Vitnessesz disk, a lever fulcrumed between the valve CHAS. O. TILLMAN, and disk and having an arm to impinge the E. A. DUGGAN. 

